Left water supply scheme Dehra

Amount

Transportation of Rig along with allied accessories etc. complete including errection and levelling at site, through all kind of roads, approaches field etc. in all leads and lifts upto site of work complete in all respect as per the directions of Engineer-in-charge.

Earth work in foundation for digging Tube well in all kinds of soils including dewatering, shoring, struting from G.L. upto 5 mtrs. including disposing excavated soil in all leads and lifts complete in all respect as per the direction of Engineer-in-charge. 0-5 mtrs.

Drilling of bore as per specifications laid down in IS-2800-1979(Part-I) with upto date ammendments, if any, with percussion Rig or combination drilling Rig starting with 650-600mm dia B19MS pipe reduced to 550-500mm dia MS pipe confirming to IS-4270-2001 with upto date ammendments, if any, in all kinds of soils, boulders, rocks, collapsible strata, saturated soils, artesian conditions including the cost of all consumables, stores, water as per directions of Engineer-in-charge.

Drilling and lowering of MS casing pipes 650-600mm dia confirming to IS 4270-2001 with upto date ammendments, if any of suitable sizes as mentioned above from 5-30 mtrs.below ground level within all leads and lifts.

Drilling and lowering of MS casing pipes 600-550mm dia confirming to IS-4270-2001 with upto date dateamendments,if any of suitable sizes as mentioned above from 30 - 60 mtrs. below ground level within all leads and lifts.

Colletion, preservation and display of suitable size sample box with top lid and locking arangement till handing over of the tube well to the department complete in all respect as per the satisfaction of Engineer in -charge.

Supplying and lowering of IS Marked Electric Resistance Welded M.S.Pipe 300mm dia nominal size, 8mm.thick having outside diametre 323.9mm.screwed & socketted confirming to IS-4270-2001 with upto date ammendments,if any, about 4.00 m. to 7.00 metres in length, welded without any circumferential joints, into bore hole in vertical position including cost of all scaffolding, derricks, poles clamps embedded in foundation etc. including cost of all cuttings,threading and welding of pipes etc.within all leads and lifts complete in all respect as per the dirctions of Engineer-in-Charge.

Supplying & Lowering of IS marked Electric Resistance welded mild Steel slotted pipe 300mm dia nominal zise housing, 8mm thick having outside diameter 323.90mm, screwed and socketted confirming to IS-4270-2001 with upto date ammendments, if any, about 4.00 metres to 7.00 meters in length pipe should have 1240 slots per metre as per IS-8110:1985 of 75x1.57mm, slot size, welded without any circumferential joints into bore hole in vertical position including cost of all scaffolding derricks, poles clamps embedded in foundation etc. including cost of all cuttings, threading and welding of pipes etc. complete in all respect as per the direction of the Engineer-in-charge.

Providing and fixing M.S.taper/reducer as per lengths approved by the Engineer-in-charge the material of M.S.taper/reducer shall be equivalent to parent pipe material and shall conform to Chemical composition as per Clause 5.2 and Mechanical properties as per clause 6.1 and Table-1 of IS:4270-2001 with uptodate ammendments, if any complete in all respect as per the directions of the Engineer-In-Charge.

Supplying and lowering of IS Marked Electric Resistance Welded M.S.Pipe 200mm dia nominal size 6.4mm.thick having outside diametre 219.1mm.screwed and socketted confirming to IS-4270-2001 with upto date ammendments, if any, about 4.00 m to 7.00 metres in length,welded without any circumferential joints, into bore hole in vertical position including cost of all scaffolding derricks, poles clamps embedded in foundation etc. including cost of all cuttings, threading and welding of pipes etc. within all leads and lifts complete in all respects as per the dirctions of Engineer-in-charge.

Supplying & Lowering of IS marked Electric Resistance welded mild Steel slotted pipe 200mm dia nominal size housing, 6.40mm thick having outside diameter 219.10mm, screwed and socketted confirming to IS-4270-2001 with upto date ammendments, if any, about 4.00 metres to 7.00 meters in length pipe should have 940 slots per metre as per IS-8110:1985 of 75x1.57mm, slot size, welded without any circumferential joints into bore hole in vertical position including cost of all scaffolding derricks, poles clamps embedded in foundation etc. including cost of all cuttings, threading and welding of pipes etc. complete in all respect as per the direction of the Engineer-in-charge.

Providing and fixing of M.S.centralized guides at suitable spacing for each Tube-well as per IS-226-1991 with uptodate ammendments,if any,within all leads and lifts as per IS-226-1991 with uptodate ammendments,if any,within all leads and lifts

Supplying,lowering and fixing in position IS-Marked mild steel bail plug of 200mm/330mm diametres with "U" hooks as per IS-2800-1991 with uptodate ammendments, if any, within all leads and lifts complete in all respects as per the directions of the Engineer-in-Charge.

Providing & fixing in position threaded iron cap with locking arrangements of approved design to prevent foreign matter from getting into bore hole,as required,within all leads and lifts complete in all respects as per the directions of the Engineer-In-Charge.

Supplying and packing of gravel,consisting of hard quartz or other suitable material, with an average specific gravity of not less than 2.5,not containing more than 2% by weight of thin flat of elongated pieces, shall be of sub rounded grains with minimum angular features of size 2-3.35 mm, shall be free from impurities such as shale, mica, felspar,clay ,sand,dirt,loam haematite and organic materials as per IS-4097-1967 with uptodate amendments,if any, around intake of tube well with minimum thickness of shroud around screen generally 100mm to the entire depth of the bore as per IS-2800 (Part-1):1991 with uptodate amendments,if any, with in all leads and lifts complete in all respect as per directions of the Engineer-In-Charge.

Extraction of all sizes blind/casing pipes with machine starting from the bottom of the bore hole,within all leads and lifts complete in all respects as per directions of the Engineer-in-Charge.

In contact with soil.

Freely handing.

Development of Tube-Well by back washing method,with air compressor of minimum 750 CFM capacity pumping pipe of 200mm size and air line of minimum 65mm size or with other suitable method, till the Well is thoroughly developed as per clause 4.2 of IS 11189-1985, with uptodate ammendments,if any complete in all respect as per the directions of the Engineer-In-Charge.

Development of Tube- Well by continuous over pumping method, with VT pumps/Submersible pumps of suitable capacity not less than double the discharge established by the compressor method/design discharge, untill the well is sand free as per IS-11189:1985 with uptodate ammendments,if any complete in all respect as per the directions of the Engineer-In-Charge.The draw down and discharge to be established by running the VT/Submersible pump continuously for 8 hours in the presence of officer not less than the rank of Assistant Engineer complete in all respect.

Testing the Verticality of theTube-Well as per Clause-4.3 of IS-2800(Part-II) 1979 with uptodate ammendments,if any,using pumps or plumer 6mm smaller in dia within the inside diameter of the Well casing the result of the verticality test shall be recorded on performa shown in Appendix -A of IS:2800(Part-II) 1979 with uptodate ammendments, if any as appended with the tender documents and handed over complete in all respect as per the directions of the Engineer-In-Charge.

Dismentalling of Rig or other allied,accessories after completion of job within all leads & lifts complete in all respects as per directions of the Engineer-In-Charge.

Construction of barbed wire enclosure of minimum of size 2.5mx2.5m to safe guard the bore of Tube Well with angle iron of size 40x40x6mm 1.5m in height, embedded in concrete block of 30x30x30cm in all leads and lifts complete in all respect as per the concrete block of 30x30x30cm in all leads and lifts complete in all respect as per the direction of the Engineer-in-Charge.

Handing over of the Tube-Well in complete shape as per appendix-B of the Clause-7 of IS-2800 (Part-II):1979 with uptodate ammendments,if any,as appended with the tender documents in laminated form,in triplicate complete in all respects as per the direction of the Engineer-in-Charge.

Providing and fixing tripod stand with chain pulley complete in all respect as per entire satisfaction of Engineer-in-charge.

H.N.SINGH AND COMPANY